footer: Fix broken D2 link
footer: Fix broken D2 link

bloodybear/yona,yona-projects/yona,doortts/fork-yobi,bloodybear/yona,yona-projects/yona,yona-projects/yona,bloodybear/yona,doortts/fork-yobi,doortts/fork-yobi,bloodybear/yona,yona-projects/yona,doortts/fork-yobi